Re: Need help on the question about the period of a cycle

Explain why the period of a cycle is not uniquely defined, and suggest a quantity that more precisely defines what we would naturally think of as the period of a cycle.

Would anyone please explain this question to me, or just give me some hints to answer this? I really appreciate your help, thank you very much!

I don't see how anyone can "suggest a quantity that more precisely defines what we would naturally think of as the period of a cycle" without knowing what it is "more precise" than! In other words, what definition of "period of a cycle" are you referring to?